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Age structure changes and extraordinary lifespan in wild medfly populations

Carey, James R [autor] | Papadopoulos, Nikos T [autor] | Müller, Hans Georg [autor] | Katsoyannos, Byron I [autor] | Kouloussis, Nikos A [autor] | Liedo Fernández, Pablo [autor].
Tipo de material: Artículo en línea Artículo en línea Tema(s): Ceratitis capitata | Moscas de la fruta | Dinámica de la poblaciónTema(s) en inglés: Ceratitis capitata | Fruit flies | Population dynamicsNota de acceso: Acceso en línea sin restricciones En: Aging Cell. volumen 7, número 3 (June 2008), páginas 426-437. --ISSN: 1474-9728Número de sistema: 36529Resumen:
Inglés

The main purpose of this study was to test the hypotheses that major changes in age structure occur in wild populations of the Mediterranean fruit fly (medfly) and that a substantial fraction of individuals survive to middle age and beyond (> 3-4 weeks). We thus brought reference life tables and deconvolution models to bear on medfly mortality data gathered from a 3-year study of field-captured individuals that were monitored in the laboratory. The average timeto- death of captured females differed between sampling dates by 23.9, 22.7, and 37.0 days in the 2003, 2004, and 2005 field seasons, respectively. These shifts in average times-to-death provided evidence of changes in population age structure. Estimates indicated that middle-aged medflies (> 30 days) were common in the population. A surprise in the study was the extraordinary longevity observed in field-captured medflies.

For example, 19 captured females but no reference females survived in the laboratory for 140 days or more, and 6 captured but no reference males survived in the laboratory for 170 days or more. This paper advances the study of aging in the wild by introducing a new method for estimating age structure in insect populations, demonstrating that major changes in age structure occur in field populations of insects, showing that middle-aged individuals are common in the wild, and revealing the extraordinary lifespans of wild-caught individuals due to their early life experience in the field.

Recurso en línea: http://onlinelibrary.wiley.com/doi/10.1111/j.1474-9726.2008.00390.x/pdf
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Acceso en línea sin restricciones

The main purpose of this study was to test the hypotheses that major changes in age structure occur in wild populations of the Mediterranean fruit fly (medfly) and that a substantial fraction of individuals survive to middle age and beyond (> 3-4 weeks). We thus brought reference life tables and deconvolution models to bear on medfly mortality data gathered from a 3-year study of field-captured individuals that were monitored in the laboratory. The average timeto- death of captured females differed between sampling dates by 23.9, 22.7, and 37.0 days in the 2003, 2004, and 2005 field seasons, respectively. These shifts in average times-to-death provided evidence of changes in population age structure. Estimates indicated that middle-aged medflies (> 30 days) were common in the population. A surprise in the study was the extraordinary longevity observed in field-captured medflies. eng

For example, 19 captured females but no reference females survived in the laboratory for 140 days or more, and 6 captured but no reference males survived in the laboratory for 170 days or more. This paper advances the study of aging in the wild by introducing a new method for estimating age structure in insect populations, demonstrating that major changes in age structure occur in field populations of insects, showing that middle-aged individuals are common in the wild, and revealing the extraordinary lifespans of wild-caught individuals due to their early life experience in the field. eng

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